The growing interest in incorporating nanotechnology into agriculture has been notable in recent years, particularly with the emergence of silver nanoparticles (AgNPs) as potential catalysts for enhancing plant growth and overall productivity. This chapter delves into the intricate relationship between AgNPs and key stages of plant development, centering on seed germination and seedling growth. Through a thorough examination of existing literature and original research findings, the chapter sheds light on the multifaceted effects of AgNPs on a variety of plant species. The exploration begins by dissecting the mechanisms governing the interaction between AgNPs and seeds during the germination process. Factors such as nanoparticle concentration, size, and exposure duration are meticulously scrutinized to unveil their nuanced impact on germination rates, dormancy alleviation, and early root development. Subsequent sections delve into the complex cellular and molecular responses triggered by AgNPs within seedlings, revealing insights into processes like nutrient uptake, photosynthesis, and antioxidative defense mechanisms. Furthermore, the chapter critically assesses the potential environmental implications of AgNPs within the soil–plant system, considering both positive and adverse effects on the ecosystem. The chapter concludes by providing valuable insights into the future prospects of deploying AgNPs in sustainable agriculture practices, emphasizing the imperative for a balanced approach that maximizes benefits while minimizing potential risks. This book chapter is positioned as an invaluable resource for researchers, agronomists, and policymakers aiming to deepen their understanding of the dynamic interplay between AgNPs and plant development, thereby contributing to the evolving realm of nano-agriculture.